For perspecive of others:
Quisling?
http://www.jewishvirtuallibrary.org/jsource/biography/Quisling.html
Vidkun Abraham Lauritz Jonssøn Quisling was a Norwegian politician and officer, commonly known as one of World War II’s most infamous traitors. He held the office of Minister President of Norway from February 1, 1942, to the end of World War II, while the elected social democratic cabinet of Johan Nygaardsvold was exiled in London. Quisling was tried for high treason and executed by firing squad after the war.
The term “quisling” has become a synonym in many European languages, including English, for traitor.
Thanks.